Charged-pion cross sections and double-helicity asymmetries in polarized p+p collisions at √s=200 GeV
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F15%3A00522390" target="_blank" >RIV/68378271:_____/15:00522390 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1103/physrevd.91.032001" target="_blank" >https://doi.org/10.1103/physrevd.91.032001</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevD.91.032001" target="_blank" >10.1103/PhysRevD.91.032001</a>
Alternative languages
Result language
angličtina
Original language name
Charged-pion cross sections and double-helicity asymmetries in polarized p+p collisions at √s=200 GeV
Original language description
We present midrapidity charged-pion invariant cross sections, the ratio of the π- to π+ cross sections and the charge-separated double-spin asymmetries in polarized p+p collisions at s=200 GeV. While the cross section measurements are consistent within the errors of next-to-leading-order (NLO) perturbative quantum chromodynamics predictions (pQCD), the same calculations overestimate the ratio of the charged-pion cross sections. This discrepancy arises from the cancellation of the substantial systematic errors associated with the NLO-pQCD predictions in the ratio and highlights the constraints these data will place on flavor-dependent pion fragmentation functions. The charge-separated pion asymmetries presented here sample an x range of ∼0.03–0.16 and provide unique information on the sign of the gluon-helicity distribution.n
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10303 - Particles and field physics
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review D
ISSN
2470-0010
e-ISSN
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Volume of the periodical
91
Issue of the periodical within the volume
3
Country of publishing house
US - UNITED STATES
Number of pages
13
Pages from-to
1-13
UT code for WoS article
000349856100001
EID of the result in the Scopus database
2-s2.0-84922261375